Peavey became Coltrane after Adoption NC

I am looking for some info, or at least a beginning to my search. My husband's father was adopted I believe around 1944 at birth in Dade County Miami Florida. I'm not 100% sure on all of this info, but I would like to find out, so would my husband. My father in law was adopted by Harris and Ada Coltrane. The real father's name or mother's name of my father in law is Peavey? Maybe Peavy, Again unsure. If anyone knows about any of this please email me and let me know. Oh, and I believe My husband's grandfather was in the military at the time of his birth. Thank you.